removed metachar:sym<$( )>

Which was my first approach to support contextualizers.
Since this is not the way STD does it, and since it doesnt work right,
it gets reverted.

Author: FROGGS

src/QRegex/P6Regex/Actions.nqp

@@ -178,10 +178,6 @@ class QRegex::P6Regex::Actions is HLL::Actions {
         make QAST::Regex.new( :rxtype<anchor>, :subtype<bol>, :node($/) );
     }
 
-    method metachar:sym<$( )>($/) {
-        make $<nibbler>.ast
-    }
-
     method metachar:sym<$>($/) {
         make QAST::Regex.new( :rxtype<anchor>, :subtype<eos>, :node($/) );
     }

src/QRegex/P6Regex/Grammar.nqp

@@ -178,7 +178,6 @@ grammar QRegex::P6Regex::Grammar is HLL::Grammar {
     token metachar:sym<ws> { <.normspace> }
     token metachar:sym<[ ]> { '[' <nibbler> ']' }
     token metachar:sym<( )> { '(' <nibbler> ')' }
-    token metachar:sym<$( )> { '$(' <nibbler> ')' }
     token metachar:sym<'> { <?[']> <quote_EXPR: ':q'> }
     token metachar:sym<"> { <?["]> <quote_EXPR: ':qq'> }
     token metachar:sym<.> { <sym> }