refactor(#664): remove explicit bouncy castle dep, comes via client -> jwk-validator

pom.xml

@@ -60,7 +60,6 @@
 
         <!-- 3rd party dependencies -->
         <nimbus.version>9.31</nimbus.version>
-        <bouncy-castle.version>1.74</bouncy-castle.version>
         <okhttp.version>4.11.0</okhttp.version>
 
         <jackson-databind.version>2.15.2</jackson-databind.version>
@@ -171,16 +170,6 @@
                 <artifactId>nimbus-jose-jwt</artifactId>
                 <version>${nimbus.version}</version>
             </dependency>
-            <dependency>
-                <groupId>org.bouncycastle</groupId>
-                <artifactId>bcprov-jdk18on</artifactId>
-                <version>${bouncy-castle.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>org.bouncycastle</groupId>
-                <artifactId>bcpkix-jdk18on</artifactId>
-                <version>${bouncy-castle.version}</version>
-            </dependency>
             <dependency>
                 <groupId>ch.qos.logback</groupId>
                 <artifactId>logback-classic</artifactId>