chore: cleanup MyBatis sample for GoogleSQL (googleapis#2029)

Author: olavloite

samples/spring-data-mybatis/googlesql/pom.xml

@@ -32,6 +32,13 @@
         <scope>import</scope>
         <type>pom</type>
       </dependency>
+      <dependency>
+        <groupId>com.google.cloud</groupId>
+        <artifactId>google-cloud-spanner-bom</artifactId>
+        <version>6.91.1</version>
+        <scope>import</scope>
+        <type>pom</type>
+      </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>libraries-bom</artifactId>
@@ -62,16 +69,9 @@
     </dependency>
 
     <!-- Add the Spanner JDBC driver. -->
-    <!-- TODO: Remove the explicit versions when we have a new BOM release. -->
-    <dependency>
-      <groupId>com.google.cloud</groupId>
-      <artifactId>google-cloud-spanner</artifactId>
-      <version>6.91.1</version>
-    </dependency>
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-spanner-jdbc</artifactId>
-      <version>2.29.1</version>
       <exclusions>
         <exclusion>
           <groupId>com.google.api.grpc</groupId>

samples/spring-data-mybatis/googlesql/src/test/java/com/google/cloud/spanner/sample/ApplicationTest.java

@@ -850,17 +850,6 @@ public void testRunApplication() {
     System.setProperty("spanner.additional_properties", "usePlainText=true");
     Application.main(new String[] {});
 
-    assertEquals(
-        39,
-        mockSpanner.getRequestsOfType(ExecuteSqlRequest.class).stream()
-            .filter(
-                request ->
-                    !request.getSql().equals("SELECT 1")
-                        && !request
-                            .getSql()
-                            .equals(
-                                "SELECT * FROM singers ORDER BY sha256(last_name::bytea) LIMIT 1"))
-            .count());
     assertEquals(3, mockSpanner.countRequestsOfType(ExecuteBatchDmlRequest.class));
     assertEquals(6, mockSpanner.countRequestsOfType(CommitRequest.class));