Drop M3_HOME as we will hardly ever migrate to M3

Author: ascheman

.envrc-template

@@ -38,10 +38,5 @@ export DEPVIS_HOME=/path/to/depvis
 # Note: M4_HOME is added to PATH in m4/compile.sh and m4/run.sh scripts, not globally
 export M4_HOME=/path/to/maven4
 
-# Path to Maven 3 (optional, for future m3/ migration comparisons)
-# SDKMAN Users: Use 'sdk install maven 3.9.11' then 'sdk home maven 3.9.11'
-# Optional
-export M3_HOME=/path/to/maven3
-
 # Add Java to PATH to ensure it is the first Java version found by any shell execution
 export PATH="$JAVA_HOME/bin:$PATH"

CLAUDE.md

@@ -524,7 +524,6 @@ Before running any examples, `jigsaw-examples/env.sh` must be configured with:
 - `JAVA8_HOME`: Only needed for `example_compile-target-jdk8`
 - `JAVA17_HOME`: Only needed for `example_gradle-project` (Gradle 9.x requires JDK 17+)
 - `M4_HOME`: Path to Maven 4 (required for `m4/` migration subdirectories)
-- `M3_HOME`: Path to Maven 3 (optional, for future `m3/` migration comparisons)
 - `GRAPHVIZ_HOME`: Path to GraphViz 2.38+ for module visualization
 - `DEPVIS_HOME`: Path to depvis tool (https://github.com/accso/java9-jigsaw-depvis)
 

jigsaw-examples/env.sh

@@ -25,10 +25,6 @@ set -eu -o pipefail
 # Note: M4_HOME/bin is added to PATH in m4/ scripts, not here
 [ -z "${M4_HOME:-}" ] && export M4_HOME=TODO/path/to/maven4/goes/here
 
-# Path to Maven 3 (optional, for future m3/ migration comparisons)
-# SDKMAN Users: Use 'sdk install maven 3.9.11' or similar
-[ -z "${M3_HOME:-}" ] && export M3_HOME=TODO/path/to/maven3/goes/here
-
 # Path to GraphViz >=2.38
 [ -z "${GRAPHVIZ_HOME:-}" ] && export GRAPHVIZ_HOME=TODO/path/to/graphviz2.38/goes/here
 # Path to DepVis , see https://github.com/accso/java9-jigsaw-depvis