Revert "[Specification] Return lowest supported deployment target if needed."

This reverts commit aa3d7be4.

lib/cocoapods/specification.rb

@@ -474,27 +474,7 @@ module Pod
     end
 
     def deployment_target(platform)
-      @deployment_target[platform] || ( @parent ? @parent.deployment_target(platform) : lowest_supported_deployment_target(platform) )
-    end
-
-    # Returns the lowest supported deployment target for a given platform.
-    #   The value should be pegged to the lowest deployment target supported
-    #   by a default xcode installation.
-    #
-    # @param platform [Symbol] The platform for witch the deployment target
-    #   shoud be returned.
-    #
-    # @return [String] The deployment target.
-    #
-    def lowest_supported_deployment_target(platform)
-      case platform
-      when :ios
-        '3.0'
-      when :osx
-        '10.4'
-      else
-        nil
-      end
+      @deployment_target[platform] || ( @parent ? @parent.deployment_target(platform) : nil )
     end
   end
   Spec = Specification

spec/unit/specification_spec.rb

@@ -552,7 +552,7 @@ describe "A Pod::Specification, concerning its attributes that support different
 
     it "returns the list of the supported platfroms and deployment targets" do
      @spec.available_platforms.count.should == 2
-     @spec.available_platforms.should.include? Pod::Platform.new(:osx, '10.4')
+     @spec.available_platforms.should.include? Pod::Platform.new(:osx)
      @spec.available_platforms.should.include? Pod::Platform.new(:ios, '4.0')
     end