Warnings: PSATD+RZ & More (#1814)

* PSATD+RZ: Fix Warnings

Fix a couple of warnings in PSATD + RZ.

* BesselRoots: Missing Include & using

* Kernel & Util: Unused Code & Var

3 files changed, 4 insertions, 4 deletions

diff --git a/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/PsatdAlgorithm.H b/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/PsatdAlgorithm.H
index d5efe5b74..efa907d14 100644
--- a/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/PsatdAlgorithm.H
+++ b/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/PsatdAlgorithm.H
@@ -41,7 +41,7 @@ class PsatdAlgorithm : public SpectralBaseAlgorithm
             } else {
                 return SpectralFieldIndex::n_fields;
             }
-        };
+        }
 
         // TODO Add Doxygen docs
         void InitializeSpectralCoefficients (
diff --git a/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/PsatdAlgorithmRZ.cpp b/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/PsatdAlgorithmRZ.cpp
index b96d5fa93..86d9f9696 100644
--- a/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/PsatdAlgorithmRZ.cpp
+++ b/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/PsatdAlgorithmRZ.cpp
@@ -299,7 +299,7 @@ PsatdAlgorithmRZ::CurrentCorrection (const int lev,
 }
 
 void
-PsatdAlgorithmRZ::VayDeposition (const int lev /**/,
+PsatdAlgorithmRZ::VayDeposition (const int /* lev */,
                                  SpectralFieldDataRZ& /*field_data*/,
                                  std::array<std::unique_ptr<amrex::MultiFab>,3>& /*current*/)
 {
diff --git a/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/SpectralBaseAlgorithmRZ.H b/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/SpectralBaseAlgorithmRZ.H
index c19d2fc5e..51bba5b87 100644
--- a/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/SpectralBaseAlgorithmRZ.H
+++ b/Source/FieldSolver/SpectralSolver/SpectralAlgorithms/SpectralBaseAlgorithmRZ.H
@@ -26,7 +26,7 @@ class SpectralBaseAlgorithmRZ
         // The destructor should also be a virtual function, so that
         // a pointer to subclass of `SpectraBaseAlgorithm` actually
         // calls the subclass's destructor.
-        virtual ~SpectralBaseAlgorithmRZ() {};
+        virtual ~SpectralBaseAlgorithmRZ() {}
 
         /**
          * \brief Virtual function for current correction in Fourier space
@@ -74,7 +74,7 @@ class SpectralBaseAlgorithmRZ
                                 int const norder_z, bool const nodal)
           // Compute and assign the modified k vectors
           : modified_kz_vec(spectral_kspace.getModifiedKComponent(dm, 1, norder_z, nodal))
-          {};
+          {}
 
         // Modified finite-order vectors
         KVectorComponent modified_kz_vec;