How can you disable Gutter Indicators in VS Code?

It is possible to change it in settings.json Ctrl+,

"scm.diffDecorations": "all" | "gutter" | "overview" | "none"

Or you can make them transparent:

"workbench.colorCustomizations": {
    // Gutter indicators (left)
    "editorGutter.modifiedBackground": "#0000",
    "editorGutter.addedBackground": "#0000",
    "editorGutter.deletedBackground": "#0000",
    // Scrollbar indicators (right)
    "editorOverviewRuler.addedForeground": "#0000",
    "editorOverviewRuler.modifiedForeground": "#0000",
    "editorOverviewRuler.deletedForeground": "#0000"
}

Just go to Settings and search for "Scm Diff Decorations" and set to none.