Unused assignments should be removed

SonarQube:

A dead store happens when a local variable is assigned a value that is not read by any subsequent instruction. Calculating or retrieving a value only to then overwrite it or throw it away, could indicate a serious error in the code. Even if it's not an error, it is at best a waste of resources. Therefore all calculated values should be used.

Problem:
The variable is assigned a value, which line is further overwritten.

Solution:
Removal of an unused assignment.

Where the problem occurs:

• https://github.com/openmrs/openmrs-module-registrationapp/blob/1.19.0/omod/src/main/java/org/openmrs/module/registrationapp/fragment/controller/field/DropDownFragmentController.java#L28-L29

Support materials:

• explanation of the problem by SonarQube: https://sonar.openmrs.org/coding_rules#rule_key=squid%3AS1854