SourceProxy.qml: removing binding 'output: input'
SourceProxy.qml: removing binding 'output: input'

The binding is redundant as onInputChanged will
always trigger setting output
Also the binding does generate binding-loop errors

Change-Id: Iaa1df71a633f4bbd0554d81bb807db59a02974ee
Reviewed-by: Gunnar Sletta <d0b71651f3efaa9fda200bbcc395b7b82a871fdd@digia.com>

kobolabs/qtgraphicaleffects