remove format files and cpp protobuf lib (#730)

Author: yangxk1

.github/workflows/format.yml

@@ -415,9 +415,6 @@ else()
         message(FATAL_ERROR "parquet is required, please install it and retry")
     endif()
 
-    find_package(Protobuf REQUIRED)
-    include_directories(${PROTOBUF_INCLUDE_DIRS})
-
     build_graphar()
 endif()
 

buf.gen.yaml

@@ -30,7 +30,6 @@ id=$(. /etc/os-release && echo ${ID})
 
 apt-get install -y -q --no-install-recommends \
   build-essential \
-  libprotobuf-dev \
   cmake \
   git \
   gnupg \