Python: Remove deprecated annotations

python/ql/lib/semmle/python/Exprs.qll

@@ -738,7 +738,7 @@ class Store extends Store_ { }
 class Del extends Del_ { }
 
 /** This is an artifact of the Python grammar which includes an AugLoad context, even though it is never used. */
-library class AugLoad extends AugLoad_ { }
+class AugLoad extends AugLoad_ { }
 
 /** Augmented store context, the context of var in var += 1 */
 class AugStore extends AugStore_ { }

python/ql/lib/semmle/python/filters/GeneratedCode.qll

@@ -14,7 +14,7 @@ abstract class GeneratedFile extends File {
  * There is no formal reason for the above, it just seems to work well in practice.
  */
 
-library class GenericGeneratedFile extends GeneratedFile {
+class GenericGeneratedFile extends GeneratedFile {
   GenericGeneratedFile() {
     not this instanceof SpecificGeneratedFile and
     (
@@ -103,7 +103,7 @@ private predicate auto_generated(File f) {
 /**
  * A file generated by a template engine
  */
-abstract library class SpecificGeneratedFile extends GeneratedFile {
+abstract class SpecificGeneratedFile extends GeneratedFile {
   /*
    * Currently cover Spitfire, Pyxl and Mako.
    *  Django templates are not compiled to Python.

python/ql/lib/semmle/python/objects/TObject.qll

@@ -453,7 +453,7 @@ predicate common_module_name(string name) { name = ["zope.interface", "six.moves
  * This acts as a helper for ClassObjectInternal allowing some lookup without
  * recursion.
  */
-library class ClassDecl extends @py_object {
+class ClassDecl extends @py_object {
   ClassDecl() {
     this.(Builtin).isClass() and not this = Builtin::unknownType()
     or

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

@@ -8,7 +8,7 @@ private import semmle.python.types.Builtins
 private import semmle.python.types.Extensions
 
 /* Use this version for speed */
-library class CfgOrigin extends @py_object {
+class CfgOrigin extends @py_object {
   /** Gets a textual representation of this element. */
   string toString() {
     /* Not to be displayed */

python/ql/src/Expressions/Formatting/AdvancedFormatting.qll

@@ -1,7 +1,7 @@
 import python
 
 /** A string constant that looks like it may be used in string formatting operations. */
-library class PossibleAdvancedFormatString extends StrConst {
+class PossibleAdvancedFormatString extends StrConst {
   PossibleAdvancedFormatString() { this.getText().matches("%{%}%") }
 
   private predicate field(int start, int end) {