[windows] don't disable ffmpeg default features

windows-1809/cuda-devel/Dockerfile

@@ -16,7 +16,7 @@ RUN [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tl
 
 RUN cd $env:VCPKG_DIR; \
     ./vcpkg install --triplet "$env:VCPKG_TARGET_TRIPLET" \
-        "\"ffmpeg[nvcodec,avresample,core]\"" \
+        "\"ffmpeg[nvcodec,avresample]\"" \
         "\"opencv4[cuda,ffmpeg,ximea,opengl,contrib,ipp,dnn]\""; \
     Remove-Item -Force -Recurse ./downloads; \
     Remove-Item -Force -Recurse ./buildtrees; \

windows-1809/devel/Dockerfile

@@ -6,7 +6,7 @@ LABEL authors="Moritz Maxeiner <moritz.maxeiner@fu-berlin.de>"
 
 RUN cd $env:VCPKG_DIR; \
     ./vcpkg install --triplet "$env:VCPKG_TARGET_TRIPLET" \
-        "\"ffmpeg[avresample,core]\"" \
+        "\"ffmpeg[avresample]\"" \
         "\"opencv4[ffmpeg,ximea,opengl,contrib,ipp,dnn]\""; \
     Remove-Item -Force -Recurse ./downloads; \
     Remove-Item -Force -Recurse ./buildtrees; \