Move SQLite3 flow model to MaD and remove ql sanitizer

ruby/ql/lib/codeql/ruby/frameworks/Sqlite3.model.yml

@@ -0,0 +1,6 @@
+extensions:
+  - addsTo:
+      pack: codeql/ruby-all
+      extensible: summaryModel
+    data:
+      - ['SQLite3::Database!', 'Method[quote]', 'Argument[0]', 'ReturnValue', 'taint']

ruby/ql/lib/codeql/ruby/frameworks/Sqlite3.qll

@@ -76,26 +76,4 @@ module Sqlite3 {
 
     override DataFlow::Node getSql() { result = this.getArgument(0) }
   }
-
-  /**
-   * A call to `SQLite3::Database.quote`, considered as a sanitizer for SQL statements.
-   */
-  private class SQLite3QuoteSanitization extends SqlSanitization {
-    SQLite3QuoteSanitization() {
-      this = API::getTopLevelMember("SQLite3").getMember("Database").getAMethodCall("quote")
-    }
-  }
-
-  /**
-   * Flow summary for `SQLite3::Database.quote()`.
-   */
-  private class QuoteSummary extends SummarizedCallable::Range {
-    QuoteSummary() { this = "SQLite3::Database.quote()" }
-
-    override MethodCall getACall() { result = any(SQLite3QuoteSanitization c).asExpr().getExpr() }
-
-    override predicate propagatesFlow(string input, string output, boolean preservesValue) {
-      input = "Argument[0]" and output = "ReturnValue" and preservesValue = false
-    }
-  }
 }