Remove USE_NINJA

Is no longer necessary here with newer cmake.port.mk

games/openclonk/Makefile

@@ -49,9 +49,6 @@ CONFIGURE_ARGS +=	-DFREETYPE_INCLUDE_DIRS="${X11BASE}/include/freetype2" \
 CXXFLAGS +=	-I${LOCALBASE}/include -I${X11BASE}/include
 MODCMAKE_LDFLAGS =	-L${LOCALBASE}/lib
 
-# Random, intermittent failures with Ninja during fake.
-USE_NINJA =	No
-
 NO_TEST =	Yes
 
 WRKDIST =	${WRKDIR}/openclonk-release-${V}-src

math/mlpack/Makefile

@@ -89,9 +89,6 @@ CONFIGURE_ARGS += 	-DCMAKE_DISABLE_FIND_PACKAGE_Git=TRUE \
 			-DBUILD_PYTHON_BINDINGS=ON \
 			-DCMAKE_INSTALL_MANDIR=${PREFIX}/man/man1
 
-# naddy reported a burp
-USE_NINJA =	No
-
 # XXX note that some of the tests WILL fail. You've got to love probabilistic
 # software...
 TEST_ENV = 	CTEST_OUTPUT_ON_FAILURE=1

math/plplot/Makefile

@@ -38,9 +38,6 @@ myRUN_DEPENDS =	print/ghostscript/gnu-fonts
 
 MODULES +=	devel/cmake
 
-# Until the cmake ninja generator supports fortran
-USE_NINJA =		No
-
 CONFIGURE_ARGS =	-D ENABLE_ada=OFF \
 			-D ENABLE_cxx=ON \
 			-D ENABLE_d=OFF \