Bump plexus-utils from 3.4.2 to 3.5.0

Bumps [plexus-utils](https://github.com/codehaus-plexus/plexus-utils) from 3.4.2 to 3.5.0.
- [Release notes](https://github.com/codehaus-plexus/plexus-utils/releases)
- [Commits](codehaus-plexus/plexus-utils@plexus-utils-3.4.2...plexus-utils-3.5.0)

---
updated-dependencies:
- dependency-name: org.codehaus.plexus:plexus-utils
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -140,7 +140,7 @@
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-utils</artifactId>
-      <version>3.4.2</version>
+      <version>3.5.0</version>
     </dependency>
 
     <dependency>

src/main/java/org/codehaus/mojo/exec/ExecMojo.java

@@ -530,17 +530,10 @@ private Map<String, String> handleSystemEnvVariables()
     {
 
         Map<String, String> enviro = new HashMap<String, String>();
-        try
-        {
-            Properties systemEnvVars = CommandLineUtils.getSystemEnvVars();
-            for ( Map.Entry<?, ?> entry : systemEnvVars.entrySet() )
-            {
-                enviro.put( (String) entry.getKey(), (String) entry.getValue() );
-            }
-        }
-        catch ( IOException x )
+        Properties systemEnvVars = CommandLineUtils.getSystemEnvVars();
+        for ( Map.Entry<?, ?> entry : systemEnvVars.entrySet() )
         {
-            getLog().error( "Could not assign default system enviroment variables.", x );
+            enviro.put( (String) entry.getKey(), (String) entry.getValue() );
         }
 
         if ( environmentVariables != null )