Remove unused dependency management for Gradle modules

Closes gh-389

Author: wilkinsona

pom.xml

@@ -40,7 +40,6 @@
 <asm.version>7.3.1</asm.version>
 <assertj.version>3.8.0</assertj.version>
 <checkstyle.version>9.3</checkstyle.version>
-<gradle.version>3.4</gradle.version>
 <groovy.version>2.4.21</groovy.version>
 <log4j.version>2.17.1</log4j.version>
 <maven-core.version>3.8.8</maven-core.version>
@@ -535,46 +534,6 @@
 <artifactId>groovy</artifactId>
 <version>${groovy.version}</version>
 </dependency>
-<dependency>
-<groupId>org.gradle</groupId>
-<artifactId>gradle-base-services</artifactId>
-<version>${gradle.version}</version>
-</dependency>
-<dependency>
-<groupId>org.gradle</groupId>
-<artifactId>gradle-base-services-groovy</artifactId>
-<version>${gradle.version}</version>
-</dependency>
-<dependency>
-<groupId>org.gradle</groupId>
-<artifactId>gradle-core</artifactId>
-<version>${gradle.version}</version>
-</dependency>
-<dependency>
-<groupId>org.gradle</groupId>
-<artifactId>gradle-language-java</artifactId>
-<version>${gradle.version}</version>
-</dependency>
-<dependency>
-<groupId>org.gradle</groupId>
-<artifactId>gradle-language-jvm</artifactId>
-<version>${gradle.version}</version>
-</dependency>
-<dependency>
-<groupId>org.gradle</groupId>
-<artifactId>gradle-platform-jvm</artifactId>
-<version>${gradle.version}</version>
-</dependency>
-<dependency>
-<groupId>org.gradle</groupId>
-<artifactId>gradle-plugins</artifactId>
-<version>${gradle.version}</version>
-</dependency>
-<dependency>
-<groupId>org.gradle</groupId>
-<artifactId>gradle-tooling-api</artifactId>
-<version>${gradle.version}</version>
-</dependency>
 <dependency>
 <groupId>org.javassist</groupId>
 <artifactId>javassist</artifactId>