diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 37f853b1..ff23a68d 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.2-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/tools/check-java-versions.sh b/tools/check-java-versions.sh
deleted file mode 100755
index af3f0997..00000000
--- a/tools/check-java-versions.sh
+++ /dev/null
@@ -1,21 +0,0 @@
-#!/bin/bash
-
-TMP=$(mktemp -d)
-if [ -z ${TMP} ]
-then
-    echo "Problem creating TEMP directory; aborting!"
-    exit 1
-fi
-
-pushd build
-  for JAR in $(find . -name "*.jar" -a -not -name "*-sources.jar" -a -not -name "*-javadoc.jar")
-  do
-    echo "Checking ${JAR}..."
-    unzip -qq -d ${TMP} ${JAR}
-    find ${TMP} -name "*.class" | xargs file -b | sort -u
-    rm -rf ${TMP}/*
-    echo
-  done
-popd
-
-rm -rf ${TMP}
diff --git a/tools/retrolambda-2.5.6.jar b/tools/retrolambda-2.5.6.jar
deleted file mode 100644
index 2c7a7409..00000000
Binary files a/tools/retrolambda-2.5.6.jar and /dev/null differ
diff --git a/tools/retrolambda.sh b/tools/retrolambda.sh
deleted file mode 100755
index e4c3e37a..00000000
--- a/tools/retrolambda.sh
+++ /dev/null
@@ -1,49 +0,0 @@
-#!/bin/sh
-
-if [ $# -gt 0 -a "$1" = "-v" ]
-then
-    RETROFLAG="false"
-    JARFLAG="v"
-    shift
-    set -x
-fi 
-
-if [ $# -ne 1 ]
-then
-    echo Provide on jar file to convert on the command line.
-    exit 1
-fi
-
-REALPATH=$(realpath $0)
-BIN_DIR=`dirname "$REALPATH"`
-LIB_DIR=$BIN_DIR
-
-JAR_TO_CONVERT="$1"
-INPUT_DIR="$JAR_TO_CONVERT".inputdir
-OUTPUT_DIR="$JAR_TO_CONVERT".outputdir
-
-rm -rf "$INPUT_DIR"
-rm -rf "$OUTPUT_DIR"
-mkdir "$INPUT_DIR"
-mkdir "$OUTPUT_DIR"
-(cd "$INPUT_DIR"; jar -x${JARFLAG}f $OLDPWD/"$JAR_TO_CONVERT")
-
-echo "Converting..."
-java \
-    -Dretrolambda.bytecodeVersion=49          \
-    -Dretrolambda.defaultMethods=true         \
-    -Dretrolambda.inputDir="$INPUT_DIR"       \
-    -Dretrolambda.outputDir="$OUTPUT_DIR"     \
-    -Dretrolambda.classpath="$JAR_TO_CONVERT" \
-    -Dretrolambda.javacHacks=true             \
-    -Dretrolambda.quiet=${RETROFLAG:-true}    \
-    -jar "$LIB_DIR"/retrolambda-2.5.6.jar
-
-# The order of the "m" and "f" must match the order that the
-# corresponding files appear in the argument list. This is
-# so stupid...
-NEW_JAR_NAME="${JAR_TO_CONVERT%.jar}-java5.jar"
-echo "Repackaging to ${NEW_JAR_NAME}"
-jar -c${JARFLAG}fm "${NEW_JAR_NAME}" \
-    "$OUTPUT_DIR"/META-INF/MANIFEST.MF \
-    -C "$OUTPUT_DIR" .