Useless imports should be removed

From https://wiki.openmrs.org/display/docs/Java+Conventions

Imports that are not used should be removed, remember that you introduce dependencies that are not needed!

First case:

• SonarQube link: https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AWcHAZjg8fYkPidqGdVo&open=AWcHAZjg8fYkPidqGdVo
• GitHub link: https://github.com/openmrs/openmrs-core/blob/master/api/src/main/java/org/openmrs/FormResource.java#L17

Second case:

• SonarQube link: https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AWcHAZiJ8fYkPidqGdVn&open=AWcHAZiJ8fYkPidqGdVn
• GitHub link: https://github.com/openmrs/openmrs-core/blob/master/api/src/main/java/org/openmrs/GlobalProperty.java#L18

Third case:

• SonarQube links:

1. https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXParDec5zdzQEOFIPDl&open=AXParDec5zdzQEOFIPDl
2. https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXParDec5zdzQEOFIPDr&open=AXParDec5zdzQEOFIPDr
3. https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXParDec5zdzQEOFIPDo&open=AXParDec5zdzQEOFIPDo
4. https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXParDec5zdzQEOFIPDq&open=AXParDec5zdzQEOFIPDq
5. https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXParDec5zdzQEOFIPDn&open=AXParDec5zdzQEOFIPDn
6. https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXParDec5zdzQEOFIPDm&open=AXParDec5zdzQEOFIPDm
7. https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXParDec5zdzQEOFIPDp&open=AXParDec5zdzQEOFIPDp

• GitHub links:

1. https://github.com/openmrs/openmrs-core/blob/master/api/src/main/java/org/openmrs/Patient.java#L14
2. https://github.com/openmrs/openmrs-core/blob/master/api/src/main/java/org/openmrs/Patient.java#L20-L24
3. https://github.com/openmrs/openmrs-core/blob/master/api/src/main/java/org/openmrs/Patient.java#L27

Fourth case:

• SonarQube link: https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXParDzV5zdzQEOFIPFV&open=AXParDzV5zdzQEOFIPFV
• GitHub link: https://github.com/openmrs/openmrs-core/blob/master/api/src/main/java/org/openmrs/api/db/hibernate/NativeIfNotAssignedIdentityGenerator.java#L17

Fifth case:

• SonarQube link: https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXParD045zdzQEOFIPFf&open=AXParD045zdzQEOFIPFf
• GitHub link: https://github.com/openmrs/openmrs-core/blob/master/api/src/main/java/org/openmrs/api/db/hibernate/search/LuceneQuery.java#L37

Sixth case:

• SonarQube link: https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXK-qJyecGYr-AYGNaFw&open=AXK-qJyecGYr-AYGNaFw
• GitHub link: https://github.com/openmrs/openmrs-core/blob/master/api/src/main/java/org/openmrs/api/impl/EncounterServiceImpl.java#L23

Seventh case:

• SonarQube links:

1. https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXK-qJx5cGYr-AYGNaFq&open=AXK-qJx5cGYr-AYGNaFq
2. https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXParDuY5zdzQEOFIPFF&open=AXParDuY5zdzQEOFIPFF
3. https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXK-qJx5cGYr-AYGNaFo&open=AXK-qJx5cGYr-AYGNaFo

• GitHub links:

1. https://github.com/openmrs/openmrs-core/blob/master/api/src/main/java/org/openmrs/api/impl/UserServiceImpl.java#L27
2. https://github.com/openmrs/openmrs-core/blob/master/api/src/main/java/org/openmrs/api/impl/UserServiceImpl.java#L32
3. https://github.com/openmrs/openmrs-core/blob/master/api/src/main/java/org/openmrs/api/impl/UserServiceImpl.java#L52

Eighth case:

• SonarQube link: https://sonar.openmrs.org/project/issues?id=org.openmrs%3Aopenmrs&issues=AXParEKQ5zdzQEOFIPF6&open=AXParEKQ5zdzQEOFIPF6
• GitHub link: https://github.com/openmrs/openmrs-core/blob/master/web/src/main/java/org/openmrs/web/filter/update/UpdateFilter.java#L26

Problem:
Old and unused imports.

Solution:
Removing them.