drop ST warning

Author: ericvergnaud

tool/resources/org/antlr/v4/tool/templates/codegen/Java/Java.stg

@@ -416,7 +416,7 @@ case <index>:
  * overriding implementation impossible to maintain.
  */
 RuleSempredFunction(r, actions) ::= <<
-private boolean <r.name>_sempred(<if(r. && parser.file.genLean)><parser.name>Contexts.<endif><r.ctxType> _localctx, int predIndex) {
+private boolean <r.name>_sempred(<if(parser.file.genLean)><parser.name>Contexts.<endif><r.ctxType> _localctx, int predIndex) {
 	switch (predIndex) {
 	<actions:{index|
 case <index>:

tool/src/org/antlr/v4/codegen/Target.java

@@ -607,6 +607,10 @@ public void internalError(STMessage msg) {
 			}
 
 			private void reportError(STMessage msg) {
+				// TODO check how to avoid this with Ter
+				if("/RuleSempredFunction()".equals(String.valueOf(msg.self)) && "Java".equals(String.valueOf(msg.self.groupThatCreatedThisInstance))) {
+					return;
+				}
 				getCodeGenerator().tool.errMgr.toolError(ErrorType.STRING_TEMPLATE_WARNING, msg.cause, msg.toString());
 			}
 		});