GH-1289 Remove explicit Kotlin versioning

Resolves #1289

Author: olegz

pom.xml

@@ -21,8 +21,6 @@
 		<maven.compiler.source>${java.version}</maven.compiler.source>
 		<maven.compiler.target>${java.version}</maven.compiler.target>
 		<wrapper.version>1.0.31.RELEASE</wrapper.version>
-		<kotlin.version>2.1.0</kotlin.version>
-		<kotlinx.version>1.10.2</kotlinx.version>
 		<docs.main>spring-cloud-function</docs.main>
 		<maven-checkstyle-plugin.failsOnError>true</maven-checkstyle-plugin.failsOnError>
 		<maven-checkstyle-plugin.failsOnViolation>true

spring-cloud-function-context/pom.xml

@@ -90,19 +90,16 @@
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-stdlib-jdk8</artifactId>
-			<version>${kotlin.version}</version>
 			<optional>true</optional>
 		</dependency>
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-reflect</artifactId>
-			<version>${kotlin.version}</version>
 			<optional>true</optional>
 		</dependency>
 		<dependency>
 			<groupId>org.jetbrains.kotlinx</groupId>
 			<artifactId>kotlinx-coroutines-reactor</artifactId>
-			<version>${kotlinx.version}</version>
 			<optional>true</optional>
 		</dependency>
 
@@ -170,7 +167,6 @@
 			<plugin>
 				<artifactId>kotlin-maven-plugin</artifactId>
 				<groupId>org.jetbrains.kotlin</groupId>
-				<version>2.1.0</version>
 				<executions>
 					<execution>
 						<id>compile</id>

spring-cloud-function-kotlin/pom.xml

@@ -45,17 +45,14 @@
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-stdlib-jdk8</artifactId>
-			<version>${kotlin.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jetbrains.kotlin</groupId>
 			<artifactId>kotlin-reflect</artifactId>
-			<version>${kotlin.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jetbrains.kotlinx</groupId>
 			<artifactId>kotlinx-coroutines-reactor</artifactId>
-			<version>${kotlinx.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
@@ -89,7 +86,6 @@
 			<plugin>
 				<artifactId>kotlin-maven-plugin</artifactId>
 				<groupId>org.jetbrains.kotlin</groupId>
-				<version>2.1.10</version>
 				<executions>
 					<execution>
 						<id>test-compile</id>