Remove accidental duplicate dependencies

Author: ashanbrown

ldclient-rb.gemspec

@@ -29,9 +29,6 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "connection_pool", ">= 2.1.2"
   spec.add_development_dependency "moneta", "~> 1.0.0"
 
-  spec.add_runtime_dependency "json", "~> 1.8"
-  spec.add_runtime_dependency "faraday", "~> 0.9"
-  spec.add_runtime_dependency "faraday-http-cache", "~> 1.3.0"
   spec.add_runtime_dependency "json", [">= 1.8", "< 3"]
   spec.add_runtime_dependency "faraday", [">= 0.9", "< 2"]
   spec.add_runtime_dependency "faraday-http-cache", [">= 1.3.0", "< 3"]