octave: let JAVA_HOME set by depends_on :java

Closes #1896.

Signed-off-by: Ian Lancaster <ilancaster@gmail.com>

Author: xu-cheng

octave.rb

@@ -126,7 +126,6 @@ def install
     ENV.m64 if MacOS.prefer_64_bit?
     ENV.append_to_cflags "-D_REENTRANT"
     ENV.append "LDFLAGS", "-L#{Formula["readline"].opt_lib} -lreadline" if build.with? "readline"
-    ENV["JAVA_HOME"] = `/usr/libexec/java_home`.chomp! if build.with? :java
     args = ["--prefix=#{prefix}"]
 
     args << "--with-blas=-L#{Formula["openblas"].opt_lib} -lopenblas" if build.with? "openblas"