fixing duplicate theme mistypo

Author: GuelBandeira

src/themes.php

@@ -2134,19 +2134,6 @@
         "dates" => "#A7ADBA",
         "excludeDaysLabel" => "#A7ADBA",
     ],
-    "oceanic-next" => [
-        "background" => "#1B2B34",
-        "border" => "#343D46",
-        "stroke" => "#4F5B66",
-        "ring" => "#6699CC",
-        "fire" => "#EC5F67",
-        "currStreakNum" => "#99C794",
-        "sideNums" => "#6699CC",
-        "currStreakLabel" => "#FAC863",
-        "sideLabels" => "#5FB3B3",
-        "dates" => "#A7ADBA",
-        "excludeDaysLabel" => "#A7ADBA",
-    ],
     "kanagawa-paper" => [
         "background" => "#1F1F28",
         "border" => "#54546D",