chore: remove gpg plugin (#47)

Author: fengjiachun

pom.xml

@@ -90,7 +90,6 @@
 
         <!-- plugins -->
         <maven-compiler-plugin.version>3.8.0</maven-compiler-plugin.version>
-        <maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
         <maven-javadoc-plugin.version>2.9.1</maven-javadoc-plugin.version>
         <maven-source-plugin.version>3.0.1</maven-source-plugin.version>
         <nexus-staging-maven-plugin.version>1.6.8</nexus-staging-maven-plugin.version>
@@ -275,26 +274,6 @@
                             <autoReleaseAfterClose>true</autoReleaseAfterClose>
                         </configuration>
                     </plugin>
-                    <plugin>
-                        <groupId>org.apache.maven.plugins</groupId>
-                        <artifactId>maven-gpg-plugin</artifactId>
-                        <version>${maven-gpg-plugin.version}</version>
-                        <executions>
-                            <execution>
-                                <id>sign-artifacts</id>
-                                <goals>
-                                    <goal>sign</goal>
-                                </goals>
-                                <phase>verify</phase>
-                                <configuration>
-                                    <gpgArguments>
-                                        <arg>--pinentry-mode</arg>
-                                        <arg>loopback</arg>
-                                    </gpgArguments>
-                                </configuration>
-                            </execution>
-                        </executions>
-                    </plugin>
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-source-plugin</artifactId>