[Java] Revert.

Author: mjpt777

build.gradle

@@ -30,7 +30,6 @@ defaultTasks 'clean', 'build', 'shadowJar', 'install'
 def sbeGroup = 'uk.co.real-logic'
 def sbeVersion = file('version.txt').text.trim()
 def sbeJavaVersion = JavaVersion.VERSION_1_8
-def sbeJavaReleaseVersion = '8'
 
 group = sbeGroup
 version = sbeVersion
@@ -139,25 +138,15 @@ subprojects {
     checkstyle.toolVersion = '8.25'
 
     compileJava {
-        if (JavaVersion.current().ordinal() >= JavaVersion.VERSION_1_9.ordinal()) {
-            options.compilerArgs.addAll(['--release', sbeJavaReleaseVersion])
-        }
-        else {
-            sourceCompatibility = sbeJavaVersion
-            targetCompatibility = sbeJavaVersion
-        }
+        sourceCompatibility = sbeJavaVersion
+        targetCompatibility = sbeJavaVersion
         options.encoding = 'UTF-8'
         options.deprecation = true
     }
 
     compileTestJava {
-        if (JavaVersion.current().ordinal() >= JavaVersion.VERSION_1_9.ordinal()) {
-            options.compilerArgs.addAll(['--release', sbeJavaReleaseVersion])
-        }
-        else {
-            sourceCompatibility = sbeJavaVersion
-            targetCompatibility = sbeJavaVersion
-        }
+        sourceCompatibility = sbeJavaVersion
+        targetCompatibility = sbeJavaVersion
         options.encoding = 'UTF-8'
         options.deprecation = true
     }
@@ -217,13 +206,8 @@ project(':sbe-tool') {
 
     compileGeneratedJava {
         dependsOn 'generateCodecs'
-        if (JavaVersion.current().ordinal() >= JavaVersion.VERSION_1_9.ordinal()) {
-            options.compilerArgs.addAll(['--release', sbeJavaReleaseVersion])
-        }
-        else {
-            sourceCompatibility = sbeJavaVersion
-            targetCompatibility = sbeJavaVersion
-        }
+        sourceCompatibility = sbeJavaVersion
+        targetCompatibility = sbeJavaVersion
         options.encoding = 'UTF-8'
         options.deprecation = true
         classpath += sourceSets.main.runtimeClasspath
@@ -381,13 +365,8 @@ project(':sbe-samples') {
 
     compileGeneratedJava {
         dependsOn 'generateCodecs'
-        if (JavaVersion.current().ordinal() >= JavaVersion.VERSION_1_9.ordinal()) {
-            options.compilerArgs.addAll(['--release', sbeJavaReleaseVersion])
-        }
-        else {
-            sourceCompatibility = sbeJavaVersion
-            targetCompatibility = sbeJavaVersion
-        }
+        sourceCompatibility = sbeJavaVersion
+        targetCompatibility = sbeJavaVersion
         options.encoding = 'UTF-8'
         options.deprecation = true
         classpath += project(':sbe-all').sourceSets.main.runtimeClasspath
@@ -482,13 +461,8 @@ project(':sbe-benchmarks') {
 
     compileGeneratedJava {
         dependsOn 'generateCodecs'
-        if (JavaVersion.current().ordinal() >= JavaVersion.VERSION_1_9.ordinal()) {
-            options.compilerArgs.addAll(['--release', sbeJavaReleaseVersion])
-        }
-        else {
-            sourceCompatibility = sbeJavaVersion
-            targetCompatibility = sbeJavaVersion
-        }
+        sourceCompatibility = sbeJavaVersion
+        targetCompatibility = sbeJavaVersion
         options.encoding = 'UTF-8'
         options.deprecation = true
         classpath += project(':sbe-all').sourceSets.main.runtimeClasspath