Move size_limit_bytes default to Yaml

Author: davidstosik

config/default.yml

@@ -296,6 +296,7 @@ PreCommit:
   FileSize:
     enabled: false
     description: 'Check for oversized files'
+    size_limit_bytes: 1_000_000
 
   Flay:
     enabled: false

lib/overcommit/hook/pre_commit/file_size.rb

@@ -3,8 +3,6 @@
 module Overcommit::Hook::PreCommit
   # Checks for oversized files before committing.
   class FileSize < Base
-    DEFAULT_SIZE_LIMIT_BYTES = 1_000_000 # 1MB
-
     def run
       return :pass if oversized_files.empty?
 
@@ -26,7 +24,7 @@ def build_oversized_file_list
     end
 
     def size_limit_bytes
-      config.fetch('size_limit_bytes', DEFAULT_SIZE_LIMIT_BYTES)
+      config.fetch('size_limit_bytes')
     end
 
     def error_message_for(file)