fix finding java executable on windows

emzed/ext/mzmine2/installers.py

@@ -76,9 +76,10 @@ def get_jre_home(folder=_default_jre_folder()):
 @functools.lru_cache()
 def find_java_bin(folder=_default_jre_folder()):
     home = get_jre_home(folder)
+    java_executable = "java.exe" if sys.platform == "win32" else "java"
     for folder, __, files in os.walk(home):
-        if "java" in files:
-            return os.path.join(folder, "java")
+        if java_executable in files:
+            return os.path.join(folder, java_executable)
 
     raise RuntimeError(f"can not find java within {home}")
 

emzed/ext/mzmine2/remove_shoulder_peaks.py

@@ -3,13 +3,11 @@
 
 
 import tempfile
-import subprocess
 
 import emzed.lib
 
-from .exceptions import MzMine2Exception
 from .parameters import ParameterBase
-from .java_utils import construct_java_call_cli_args, run_java
+from .java_utils import run_java
 
 
 class RemoveShoulderPeaksParameters(ParameterBase):