Merge pull request #37 from OpenSPP/refactor-structure-michael

[REM] pmt on customization guide

Author: emjay0921

docs/developer_guide/customization/implementing_pmt.md

@@ -25,5 +25,4 @@ customizing_indicators
 customizing_programs
 customizing_registry
 customizing_service_points
-implementing_pmt
 ```