Fixed checkstyle warnings.

pom.xml

@@ -26,7 +26,7 @@
     <orekit.maven-bundle-plugin.version>3.3.0</orekit.maven-bundle-plugin.version>
     <orekit.maven-changes-plugin.version>2.12.1</orekit.maven-changes-plugin.version>
     <orekit.maven-checkstyle-plugin.version>2.17</orekit.maven-checkstyle-plugin.version>
-    <orekit.checkstyle.version>8.4</orekit.checkstyle.version>
+    <orekit.checkstyle.version>8.10</orekit.checkstyle.version>
     <orekit.maven-clean-plugin.version>3.0.0</orekit.maven-clean-plugin.version>
     <orekit.maven-compiler-plugin.version>3.6.1</orekit.maven-compiler-plugin.version>
     <orekit.maven-javadoc-plugin.version>2.10.4</orekit.maven-javadoc-plugin.version>

src/main/java/org/orekit/estimation/sequential/UnivariateProcessNoise.java

@@ -165,7 +165,6 @@ public class UnivariateProcessNoise extends AbstractCovarianceMatrixProvider {
      * @param previous previous state
      * @param current current state
      * @return physical (i.e. non normalized) orbital process noise matrix in inertial frame
-     * @exception OrekitException if matrix cannot be computed
      */
     private RealMatrix getInertialOrbitalProcessNoiseMatrix(final SpacecraftState previous,
                                                             final SpacecraftState current) {