[Platform] Specify deployment target only on initialization.

lib/cocoapods/platform.rb

@@ -88,12 +88,6 @@ module Pod
     #
     attr_reader :declared_deployment_target
 
-    # @todo Deprecate
-    #
-    def deployment_target= (version)
-      @deployment_target = Pod::Version.create(version)
-    end
-
     # @param [Platform, Symbol] other The other platform to check.
     #
     # @note If a symbol is passed the comparison does not take into account

spec/unit/platform_spec.rb

@@ -56,14 +56,6 @@ describe Pod::Platform do
       p.deployment_target.should == Pod::Version.new('4.0.0')
     end
 
-    it "allows to specify the deployment target after initialization" do
-      p = Pod::Platform.new(:ios, '4.0.0')
-      p.deployment_target = '4.0.0'
-      p.deployment_target.should == Pod::Version.new('4.0.0')
-      p.deployment_target = Pod::Version.new('4.0.0')
-      p.deployment_target.should == Pod::Version.new('4.0.0')
-    end
-
     it "provides a default deployment target on initialization" do
       p = Pod::Platform.new(:ios)
       p.deployment_target.should == Pod::Version.new('4.3')