Java: Hnalde global files as exceptions rather than annotating them

This allows us to merge them without redundent annoations for now.

java/ql/lib/semmle/code/java/dispatch/DispatchFlow.qll

@@ -5,8 +5,6 @@
  * data flow check for lambdas, anonymous classes, and other sufficiently
  * private classes where all object instantiations are accounted for.
  */
-overlay[global]
-module;
 
 import java
 private import VirtualDispatch

java/ql/lib/semmle/code/java/dispatch/ObjFlow.qll

@@ -6,8 +6,6 @@
  * The set of dispatch targets for `Object.toString()` calls are reduced based
  * on possible data flow from objects of more specific types to the qualifier.
  */
-overlay[global]
-module;
 
 import java
 private import VirtualDispatch

java/ql/lib/semmle/code/java/dispatch/VirtualDispatch.qll

@@ -2,8 +2,6 @@
  * Provides predicates for reasoning about runtime call targets through virtual
  * dispatch.
  */
-overlay[global]
-module;
 
 import java
 import semmle.code.java.dataflow.TypeFlow

java/ql/lib/semmle/code/java/dispatch/internal/Unification.qll

@@ -1,8 +1,6 @@
 /**
  * Provides a module to check whether two `ParameterizedType`s are unifiable.
  */
-overlay[global]
-module;
 
 import java