deps: bump OpenCensus API to 0.30.0 (#1598)

* deps: bumps opencensus to 0.30.0

* fix: remove unused dependency

Author: thiagotnunes

google-cloud-spanner/pom.xml

@@ -15,6 +15,7 @@
   </parent>
   <properties>
     <site.installationModule>google-cloud-spanner</site.installationModule>
+    <opencensus.version>0.30.0</opencensus.version>
   </properties>
 
 
@@ -187,10 +188,12 @@
     <dependency>
       <groupId>io.opencensus</groupId>
       <artifactId>opencensus-api</artifactId>
+      <version>${opencensus.version}</version>
     </dependency>
     <dependency>
       <groupId>io.opencensus</groupId>
       <artifactId>opencensus-contrib-grpc-util</artifactId>
+      <version>${opencensus.version}</version>
     </dependency>
     <dependency>
       <groupId>io.opencensus</groupId>

samples/install-without-bom/pom.xml

@@ -21,7 +21,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <opencensus.version>0.29.0</opencensus.version>
+    <opencensus.version>0.30.0</opencensus.version>
     <trace.version>2.1.0</trace.version>
     <cloudmonitoring.version>3.2.0</cloudmonitoring.version>
   </properties>

samples/snapshot/pom.xml

@@ -21,7 +21,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <opencensus.version>0.29.0</opencensus.version>
+    <opencensus.version>0.30.0</opencensus.version>
     <trace.version>2.1.0</trace.version>
     <cloudmonitoring.version>3.2.0</cloudmonitoring.version>
   </properties>

samples/snippets/pom.xml

@@ -23,7 +23,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <opencensus.version>0.29.0</opencensus.version>
+    <opencensus.version>0.30.0</opencensus.version>
   </properties>