update to only clone in makefile

.gitmodules

@@ -21,6 +21,3 @@
 [submodule "third_party/gpu-burn"]
 	path = third_party/gpu-burn
 	url = https://github.com/wilicc/gpu-burn.git
-[submodule "third_party/AMF"]
-	path = third_party/AMF
-	url = https://github.com/GPUOpen-LibrariesAndSDKs/AMF.git

third_party/Makefile

@@ -152,6 +152,7 @@ endif
 
 # Build AMD Encoder Latency Test
 directx_amf_encoding_latency:
+	git clone -b v1.4.29 https://github.com/GPUOpen-LibrariesAndSDKs/AMF.git
 	@if exist "AMF\amf\public\samples\CPPSamples_vs2019.sln" ( \
 		curl -L -o vs_buildtools.exe https://aka.ms/vs/16/release/vs_buildtools.exe && echo "Downloaded vs_buildtools.exe" && \
 		start /wait vs_buildtools.exe --quiet --wait --norestart --nocache --installPath C:/temp/BuildTools --add Microsoft.VisualStudio.Workload.VCTools --add Microsoft.VisualStudio.Component.VC.ATLMFC --includeRecommended  && echo "Installed VS Build Tools" && \