Revert "allow config file for brakeman, Fixes #30"

This reverts commit 8a5060b.

lib/polish_geeks/dev_tools/commands/brakeman.rb

@@ -4,7 +4,6 @@ module Commands
       # A static analysis security vulnerability scanner for Ruby on Rails applications
       # @see https://github.com/presidentbeef/brakeman
       class Brakeman < Base
-        self.config_name = '.brakeman.yml'
         self.type = :validator
         self.validators = [
           Validators::Rails
@@ -22,9 +21,7 @@ class Brakeman < Base
         # Executes this command
         # @return [String] command output
         def execute
-          cmd = ['bundle exec brakeman -q']
-          cmd << "-c #{config}" if config?
-          @output = Shell.new.execute(cmd.join(' '))
+          @output = Shell.new.execute('bundle exec brakeman -q')
         end
 
         # @return [Boolean] true if we didn't have any vulnerabilities detected