qt: remove redundant gcc6 check and patch

srcpkgs/qt/template

@@ -27,7 +27,7 @@ replaces="qt-qtconfig>=0"
 CXXFLAGS="-std=gnu++98 -Wno-deprecated"
 
 do_configure() {
-	local _libdir _opts _gccver
+	local _libdir _opts
 
 	export LD_LIBRARY_PATH="${wrksrc}/lib:${LD_LIBRARY_PATH}"
 	export LD="$CXX"
@@ -38,13 +38,6 @@ do_configure() {
 		_libdir=lib
 	fi
 
-	_gccver=$(gcc --version|awk '/^gcc / { print $3 }')
-	if [ "${_gccver%%.*}" -gt 5 ]; then
-		# Enable gcc6 for building webkit (which doesn't build, though)
-		sed -i configure \
-			-e"s;5\*|4\*|3.4\*);6*|&;"
-	fi
-
 	# qmake CFLAGS/LDFLAGS
 	sed -i -e '/outpath\/qmake\".*\"\$MAKE\")/s/)/ QMAKE_CFLAGS="$CFLAGS" QMAKE_CXXFLAGS="$CXXFLAGS" QMAKE_LFLAGS="$LDFLAGS" )/' \
 		-e 's/\(setBootstrapVariable\s\+\|EXTRA_C\(XX\)\?FLAGS=.*\)QMAKE_C\(XX\)\?FLAGS_\(DEBUG\|RELEASE\).*/:/' \