Don’t create circular ruby gems dependency.

rspec depends on rspec-(core|mocks|expectations), each
of which depends on this gem...so we shouldn’t depend
on rspec in turn from here.

Our gemfile takes care ensuring we have all of RSpec available
when running the specs.

Author: myronmarston

rspec-support.gemspec

@@ -31,6 +31,4 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency "bundler", "~> 1.3"
   spec.add_development_dependency "rake",    "~> 10.0.0"
-
-  spec.add_development_dependency "rspec",   ">= 3.0.0.pre"
 end