Remove dependency management for AppEngine SDK

Closes gh-30638

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -24,13 +24,6 @@ bom {
 			]
 		}
 	}
-	library("AppEngine SDK", "1.9.96") {
-		group("com.google.appengine") {
-			modules = [
-				"appengine-api-1.0-sdk"
-			]
-		}
-	}
 	library("Artemis", "2.20.0") {
 		group("org.apache.activemq") {
 			modules = [

spring-boot-project/spring-boot/build.gradle

@@ -103,9 +103,6 @@ dependencies {
 	optional("org.jetbrains.kotlin:kotlin-stdlib")
 
 	testImplementation(project(":spring-boot-project:spring-boot-tools:spring-boot-test-support"))
-	testImplementation("com.google.appengine:appengine-api-1.0-sdk") {
-		exclude group: "javax.inject", module: "javax.inject"
-	}
 	testImplementation("com.ibm.db2:jcc")
 	testImplementation("com.jayway.jsonpath:json-path")
 	testImplementation("com.microsoft.sqlserver:mssql-jdbc")

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/SpringApplicationTests.java

@@ -28,8 +28,7 @@ import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Supplier;
 
-import javax.annotation.PostConstruct;
-
+import jakarta.annotation.PostConstruct;
 import org.assertj.core.api.Condition;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/ConfigurationPropertiesTests.java

@@ -32,8 +32,7 @@ import java.util.Map;
 import java.util.Properties;
 import java.util.Set;
 
-import javax.annotation.PostConstruct;
-
+import jakarta.annotation.PostConstruct;
 import jakarta.validation.Valid;
 import jakarta.validation.constraints.NotEmpty;
 import jakarta.validation.constraints.NotNull;

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/diagnostics/FailureAnalyzersIntegrationTests.java

@@ -16,8 +16,7 @@
 
 package org.springframework.boot.diagnostics;
 
-import javax.annotation.PostConstruct;
-
+import jakarta.annotation.PostConstruct;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;