Remove generated JSON file

Change-Id: I4744b244269f49e2aae4c2159bdb7f91c1f5be6c

compile_commands.json

-[{"command": "clang++ -Wall -DMACOSX_SDK_VERSION=101200 -DBOOST_ERROR_CODE_HEADER_ONLY -DSAL_LOG_INFO -DSYSTEM_LIBXML -DBOOST_SYSTEM_NO_DEPRECATED -DUNX -DUNIX -D_PTHREADS -DLIBO_INTERNAL_ONLY -DMAC_OS_X_VERSION_MIN_REQUIRED=1080 -DOSL_DEBUG_LEVEL=1 -DX86_64 -DSAL_LOG_WARN -DNO_PTHREAD_PRIORITY -DMAC_OS_X_VERSION_MAX_ALLOWED=101200 -DMACOSX -D_REENTRANT -DCPPU_ENV=gcc3 -I/Volumes/LIBREOFFICE/play/xcode_core/l10ntools/source -Iexternal/boost/include -I/Volumes/LIBREOFFICE/play/xcode/workdir/UnpackedTarball/boost -Il10ntools/inc -Iinclude -I/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home/include/darwin -I/Volumes/LIBREOFFICE/play/xcode/config_host -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/libxml2 -fmessage-length=0 -fno-common -pipe -fno-threadsafe-statics -fvisibility-inlines-hidden -fstack-protector-strong -fPIC -fno-strict-aliasing -fsigned-char -std=gnu++14 -c /Volumes/LIBREOFFICE/play/xcode_core/l10ntools/source/pocheck.cxx", "directory": "/Volumes/LIBREOFFICE/play/xcode_core/l10ntools", "file": "/Volumes/LIBREOFFICE/play/xcode_core/l10ntools/source/pocheck.cxx"}]
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