Remove redundant command execution in `header_search_paths`
There is no need to execute command in duplicate for the same
reason as
MODIFY
tasks/toolchains/gcc.rake
tasks/toolchains/gcc.rake
@@ -35,7 +35,6 @@ MRuby::Toolchain.new(:gcc) do |conf, params|
def cc.header_search_paths
if @header_search_command != command
result = `echo | #{build.filename command} -x#{@header_search_language} -Wp,-v - -fsyntax-only 2>&1`
- result = `echo | #{command} -x#{@header_search_language} -Wp,-v - -fsyntax-only 2>&1` if $?.exitstatus != 0
return include_paths if $?.exitstatus != 0
@frameworks = []

Remove redundant command execution in `header_search_paths`

There is no need to execute command in duplicate for the same
reason as #5128.