fix(compile): 'for' loop initial declarations are only allowed in C99 mode

CMakeLists.txt

@@ -5,12 +5,6 @@ SET(CMAKE_BUILD_TYPE "Release")
 include_directories("/usr/local/include")
 link_directories("/usr/local/lib")
 
-if (NOT BUILD STREQUAL "docker")
-    #在编译选项中加入c99支持
-    add_compile_options(-std=c99)
-    message(STATUS "optional:-std=c99")
-endif ()
-
 add_executable(cmoe cmoe.c)
 add_executable(cmoeditor editor.c)