BuildSystem: Remove two dead exceptions for compiler Clang.

Commit 305ce3de added -Wno-parentheses-equality to Makefile.rules,
turning the previous two warning suppressions from commit e9520dbe
redundant. Let us remove the latter.

Change-Id: I0b471254b31e6e05902062761dded4b3e626c7ac

res/Makefile

@@ -33,9 +33,6 @@ ael/ael_lex.o: _ASTCFLAGS+=-I. -Iael -Wno-unused $(AST_NO_FORMAT_TRUNCATION)
 
 ael/ael.tab.o: ael/ael.tab.c ael/ael.tab.h ../include/asterisk/ael_structs.h
 ael/ael.tab.o: _ASTCFLAGS+=-I. -Iael -DYYENABLE_NLS=0
-	ifneq ($(AST_CLANG_BLOCKS),)
-		_ASTCFLAGS+=-Wno-parentheses-equality
-	endif
 
 ifneq ($(findstring REBUILD_PARSERS,$(MENUSELECT_CFLAGS)),)
 ael/ael_lex.c: ael/ael.flex

utils/Makefile

@@ -143,9 +143,6 @@ aelbison.c: $(ASTTOPDIR)/res/ael/ael.tab.c
 	$(ECHO_PREFIX) echo "   [CP] $(subst $(ASTTOPDIR)/,,$<) -> $@"
 	$(CMD_PREFIX) cp "$<" "$@"
 aelbison.o: _ASTCFLAGS+=-I$(ASTTOPDIR)/res/ael -DYYENABLE_NLS=0
-	ifneq ($(AST_CLANG_BLOCKS),)
-		_ASTCFLAGS+=-Wno-parentheses-equality
-	endif
 
 pbx_ael.c: $(ASTTOPDIR)/pbx/pbx_ael.c
 	$(ECHO_PREFIX) echo "   [CP] $(subst $(ASTTOPDIR)/,,$<) -> $@"