ports: Cleanup projects using cmake

There is no need to use $BANAN_CMAKE because our own toolchain directory
is added to path.

ports/SDL2_image/build.sh

@@ -6,7 +6,7 @@ DOWNLOAD_URL="https://github.com/libsdl-org/SDL_image/releases/download/release-
 DEPENDENCIES=('SDL2' 'libpng' 'libjpeg' 'libtiff' 'libwebp')
 
 configure() {
-	$BANAN_CMAKE --fresh -S . -B build -G Ninja \
+	cmake --fresh -S . -B build -G Ninja \
 		--toolchain="$BANAN_TOOLCHAIN_DIR/Toolchain.txt" \
 		-DCMAKE_INSTALL_PREFIX='/usr' \
 		-DCMAKE_BUILD_TYPE=Release \
@@ -15,9 +15,9 @@ configure() {
 }
 
 build() {
-	$BANAN_CMAKE --build build || exit 1
+	cmake --build build || exit 1
 }
 
 install() {
-	$BANAN_CMAKE --install build || exit 1
+	cmake --install build || exit 1
 }