delete all dead code

python/ql/lib/semmle/python/Flow.qll

@@ -969,12 +969,6 @@ private module Scopes {
     scope = n.getEnclosingModule()
   }
 
-  private predicate maybe_defined(SsaVariable var) {
-    exists(var.getDefinition()) and not py_ssa_phi(var, _) and not var.getDefinition().isDelete()
-    or
-    exists(SsaVariable input | input = var.getAPhiInput() | maybe_defined(input))
-  }
-
   private predicate maybe_undefined(SsaVariable var) {
     not exists(var.getDefinition()) and not py_ssa_phi(var, _)
     or

python/ql/lib/semmle/python/dataflow/old/Implementation.qll

@@ -900,22 +900,6 @@ private class EssaTaintTracking extends string {
     or
     result = this.testEvaluates(defn, not_operand(test), use, src).booleanNot()
   }
-
-  /**
-   * Holds if `test` is the test in a branch and `use` is that test
-   * with all the `not` prefixes removed.
-   */
-  private predicate boolean_filter(ControlFlowNode test, ControlFlowNode use) {
-    any(PyEdgeRefinement ref).getTest() = test and
-    (
-      use = test
-      or
-      exists(ControlFlowNode notuse |
-        this.boolean_filter(test, notuse) and
-        use = not_operand(notuse)
-      )
-    )
-  }
 }
 
 private predicate testEvaluatesMaybe(ControlFlowNode test, ControlFlowNode use) {

python/ql/lib/semmle/python/frameworks/Invoke.qll

@@ -21,9 +21,6 @@ private module Invoke {
 
   /** Provides models for the `invoke` module. */
   module invoke {
-    /** Gets a reference to the `invoke.context` module. */
-    API::Node context() { result = invoke().getMember("context") }
-
     /** Provides models for the `invoke.context` module */
     module context {
       /** Provides models for the `invoke.context.Context` class */

python/ql/lib/semmle/python/frameworks/RestFramework.qll

@@ -295,17 +295,6 @@ private module RestFramework {
       result = API::moduleImport("rest_framework").getMember("response").getMember("Response")
     }
 
-    /**
-     * A source of instances of `rest_framework.response.Response`, extend this class to model new instances.
-     *
-     * This can include instantiations of the class, return values from function
-     * calls, or a special parameter that will be set when functions are called by an external
-     * library.
-     *
-     * Use the predicate `Response::instance()` to get references to instances of `rest_framework.response.Response`.
-     */
-    abstract class InstanceSource extends DataFlow::LocalSourceNode { }
-
     /** A direct instantiation of `rest_framework.response.Response`. */
     private class ClassInstantiation extends PrivateDjango::django::http::response::HttpResponse::InstanceSource,
       DataFlow::CallCfgNode {

python/ql/lib/semmle/python/pointsto/Base.qll

@@ -185,11 +185,6 @@ predicate function_can_never_return(FunctionObject func) {
   func = ModuleObject::named("sys").attr("exit")
 }
 
-private newtype TIterationDefinition =
-  TIterationDefinition_(SsaSourceVariable var, ControlFlowNode def, ControlFlowNode sequence) {
-    SsaSource::iteration_defined_variable(var, def, sequence)
-  }
-
 /** Hold if outer contains inner, both are contained within a test and inner is a use is a plain use or an attribute lookup */
 pragma[noinline]
 predicate contains_interesting_expression_within_test(ControlFlowNode outer, ControlFlowNode inner) {

python/ql/src/Lexical/CommentedOutCode.qll

@@ -40,16 +40,6 @@ private predicate class_statement(Comment c) {
 
 private predicate triple_quote(Comment c) { c.getText().regexpMatch("#.*(\"\"\"|''').*") }
 
-private predicate triple_quoted_string_part(Comment start, Comment end) {
-  triple_quote(start) and end = start
-  or
-  exists(Comment mid |
-    triple_quoted_string_part(start, mid) and
-    end = non_empty_following(mid) and
-    not triple_quote(end)
-  )
-}
-
 private predicate maybe_code(Comment c) {
   not non_code(c) and not filler(c) and not endline_comment(c) and not file_or_url(c)
   or

python/ql/test/library-tests/locations/implicit_concatenation/part_locations.ql

@@ -1,9 +1,5 @@
 import python
 
-class ImplicitConcat extends StrConst {
-  ImplicitConcat() { exists(this.getAnImplicitlyConcatenatedPart()) }
-}
-
 from StringPart s
 select s.getLocation().getStartLine(), s.getText(), s.getLocation().getStartColumn(),
   s.getLocation().getEndColumn()

python/ql/test/library-tests/locations/implicit_concatenation/parts.ql

@@ -1,9 +1,5 @@
 import python
 
-class ImplicitConcat extends StrConst {
-  ImplicitConcat() { exists(this.getAnImplicitlyConcatenatedPart()) }
-}
-
 from StrConst s, StringPart part, int n
 where part = s.getImplicitlyConcatenatedPart(n)
 select s.getLocation().getStartLine(), s.getText(), n, part.getText()