Revert "Make Micrometer dependency optional"

This reverts commit 4959e60.

Spring Batch has a compile-time dependency to spring-context,
which in turn has a compile-time dependency to micrometer-observation.

Issue #4973

Author: fmbenhassine

pom.xml

@@ -55,9 +55,9 @@
 		<spring-framework.version>7.0.0-SNAPSHOT</spring-framework.version>
 		<spring-retry.version>2.0.13-SNAPSHOT</spring-retry.version>
 		<spring-integration.version>7.0.0-SNAPSHOT</spring-integration.version>
+		<micrometer.version>1.16.0-SNAPSHOT</micrometer.version>
 
 		<!-- optional production dependencies -->
-        <micrometer.version>1.16.0-SNAPSHOT</micrometer.version>
 		<spring-data-commons.version>4.0.0-SNAPSHOT</spring-data-commons.version>
 		<spring-data-jpa.version>4.0.0-SNAPSHOT</spring-data-jpa.version>
 		<spring-data-redis.version>4.0.0-SNAPSHOT</spring-data-redis.version>

spring-batch-core/pom.xml

@@ -54,20 +54,18 @@
 			<artifactId>spring-jdbc</artifactId>
 			<version>${spring-framework.version}</version>
 		</dependency>
+		<dependency>
+			<groupId>io.micrometer</groupId>
+			<artifactId>micrometer-core</artifactId>
+			<version>${micrometer.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>io.micrometer</groupId>
+			<artifactId>micrometer-observation</artifactId>
+			<version>${micrometer.version}</version>
+		</dependency>
 
 		<!-- optional production dependencies -->
-        <dependency>
-            <groupId>io.micrometer</groupId>
-            <artifactId>micrometer-core</artifactId>
-            <version>${micrometer.version}</version>
-            <optional>true</optional>
-        </dependency>
-        <dependency>
-            <groupId>io.micrometer</groupId>
-            <artifactId>micrometer-observation</artifactId>
-            <version>${micrometer.version}</version>
-            <optional>true</optional>
-        </dependency>
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-databind</artifactId>

spring-batch-samples/pom.xml

@@ -59,16 +59,6 @@
 			<artifactId>micrometer-registry-prometheus-simpleclient</artifactId>
 			<version>${micrometer.version}</version>
 		</dependency>
-        <dependency>
-            <groupId>io.micrometer</groupId>
-            <artifactId>micrometer-core</artifactId>
-            <version>${micrometer.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>io.micrometer</groupId>
-            <artifactId>micrometer-observation</artifactId>
-            <version>${micrometer.version}</version>
-        </dependency>
 		<dependency>
 			<groupId>commons-io</groupId>
 			<artifactId>commons-io</artifactId>