Bug 47315 Add quick fix for remove an unused @ Javadoc tag. [quick fix]
The 3.0.m5 Javadoc warnings are *great* and will improve our Javadocs. Could we hae quick fixes for the new warnings when possible. For example: when a @throws is no longer valid, a quick fix to remove the comment would be great. Version 3.0.m5.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/JavadocTagsSubProcessor.java
if (!methodDecl.isConstructor()) {
			Type type= methodDecl.getReturnType();
			if (!type.isPrimitiveType() || (((PrimitiveType) type).getPrimitiveTypeCode() != PrimitiveType.VOID)) {
				if (findTag(javadoc, "@return", null) == null) { 
					TagElement newTag= ast.newTagElement();
					newTag.setTagName("@return"); 
					insertReturnTag(javadoc, tagsRewriter, newTag);
				}
			}
		}
		List throwsExceptions= methodDecl.thrownExceptions();
		for (int i= throwsExceptions.size() - 1; i >= 0 ; i--) {
			Name exception= (Name) throwsExceptions.get(i);
			ITypeBinding binding= exception.resolveTypeBinding();
			if (binding != null) {
				String name= binding.getName();
				if (findThrowsTag(javadoc, name) == null) {
					TagElement newTag= ast.newTagElement();
					newTag.setTagName("@throws"); 
					newTag.fragments().add(ast.newSimpleName(name));
					insertThrowsTag(javadoc, tagsRewriter, newTag, exception);
				}
			}
		}
		proposals.add(addAllMissing);
	}
	
	public static TagElement findTag(Javadoc javadoc, String name, String arg) {
		List tags= javadoc.tags();
		int nTags= tags.size();