Revert "Extract replaceTextStoreString method"
Revert "Extract replaceTextStoreString method"

This reverts commit 7139f5f2fd6df7f3dbb6b001eeb393ca0427b07b.

wordpress-mobile/AztecEditor-iOS,wordpress-mobile/AztecEditor-iOS,wordpress-mobile/AztecEditor-iOS,wordpress-mobile/AztecEditor-iOS