Undid changes to DEVELOPER_GUIDE.rst.

Signed-off-by: Mitchell Gale <Mitchell.Gale@improving.com>

DEVELOPER_GUIDE.rst

@@ -113,8 +113,8 @@ Note that missing license header will be detected by Gradle license plugin and f
 Making Code Changes
 ===================
 
-Project Structure
------------------
+Project Strucure
+----------------
 
 The plugin codebase is in standard layout of Gradle project::
 
@@ -213,7 +213,7 @@ Most of the time you just need to run ./gradlew build which will make sure you p
    * - ./gradlew generateGrammarSource
      - (Re-)Generate ANTLR parser from grammar file.
    * - ./gradlew compileJava
-     - Compile all Java source files. 
+     - Compile all Java source files.
    * - ./gradlew checkstyle
      - Run all checks according to Checkstyle configuration.
    * - ./gradlew test
@@ -226,10 +226,6 @@ Most of the time you just need to run ./gradlew build which will make sure you p
      - Build plugin by run all tasks above (this takes time).
    * - ./gradlew pitest
      - Run PiTest mutation testing (see more info in `#1204 <https://github.com/opensearch-project/sql/pull/1204>`_)
-   * - ./gradlew spotlessCheck
-     - Runs Spotless to check for code style.
-   * - ./gradlew spotlessApply
-     - Automatically apply spotless code style changes.
 
 For integration test, you can use ``-Dtests.class`` “UT full path” to run a task individually. For example ``./gradlew :integ-test:integTest -Dtests.class="*QueryIT"``.