Drop maven profile for JDK 9 and 10

Related with gh-306

Author: kazuki43zoo

pom.xml

@@ -127,34 +127,6 @@
   </build>
 
   <profiles>
-    <profile>
-      <id>jdk9</id>
-      <activation>
-        <jdk>9</jdk>
-      </activation>
-      <dependencies>
-        <dependency>
-          <groupId>javax.annotation</groupId>
-          <artifactId>javax.annotation-api</artifactId>
-          <version>1.3.2</version>
-          <scope>test</scope>
-        </dependency>
-      </dependencies>
-    </profile>
-    <profile>
-      <id>jdk10</id>
-      <activation>
-        <jdk>10</jdk>
-      </activation>
-      <dependencies>
-        <dependency>
-          <groupId>javax.annotation</groupId>
-          <artifactId>javax.annotation-api</artifactId>
-          <version>1.3.2</version>
-          <scope>test</scope>
-        </dependency>
-      </dependencies>
-    </profile>
     <profile>
       <id>jdk11</id>
       <activation>