Remove gradle nature from eclipse project

Question

I just mirrored a repo that uses maven, however when manually editing the maven modules' .project and .classpath files I accidentally used gradle instead of maven. I've since changed the files manually to maven and have gotten rid of all gradle related text I could find, however eclipse is giving me this error on all modules

Missing Gradle project configuration file: .settings/org.eclipse.buildship.core.prefs EssentialsX Unknown Gradle Project Configuration Marker

How can I solve this error?

Also, here is this specific maven module's .project file

<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
    <name>Essentials</name>
    <comment></comment>
    <projects>
    </projects>
    <buildSpec>
        <buildCommand>
            <name>org.eclipse.jdt.core.javabuilder</name>
            <arguments>
            </arguments>
        </buildCommand>
        <buildCommand>
            <name>org.eclipse.m2e.core.maven2Builder</name>
            <arguments>
            </arguments>
        </buildCommand>
    </buildSpec>
    <natures>
        <nature>org.eclipse.m2e.core.maven2Nature</nature>
        <nature>org.eclipse.jdt.core.javanature</nature>
    </natures>
</projectDescription>

And here is the .classpath file

<classpath>
    <classpathentry kind="src" path="src"/>
    <classpathentry kind="src" path="test"/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
    <classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
        <attributes>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="output" path="bin"/>
</classpath>

Thank you for your time!

Answer 1

To remove a nature from a project go to it's folder and in its .project file, under <natures> remove <nature>org.eclipse.buildship.core.gradleprojectnature</nature>. This will remove the icon (if you had it shown - you can choose to not show an icon even if the nature is applied) and the right click context menu gradle entry.

Also, in the .classpath file remove the line <classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>. This exports the entry to the runtime classpath.

You can then delete the build and settings gradle files, the wrapper files if you had them, the .bat file, the org.eclipse.buildship.core.prefs under .settings folder, and the .externalToolBuilder if applicable.

Since you already messed with the files and still getting the error I suggest you reapply the gradle nature from Eclipse (use the buildship importer) and when all the errors are resolved do as described above.