Remove django-spreadsheetresponsemixin

We're not using it and it has been deprecated anyway

Pipfile

@@ -20,7 +20,6 @@ django-constance = {extras = ["database"],version = "*"}
 django-filter = "*"
 django-floppyforms = "*"
 django-form-utils = "*"
-django-spreadsheetresponsemixin = "*"
 django-widget-tweaks = "*"
 djangorestframework = "*"
 djangorestframework-bulk = "*"

Pipfile.lock

 {
     "_meta": {
         "hash": {
-            "sha256": "629470871d545227ecfc67e5c2748637f2b79dadd9b8f1133e18ce2737be7f23"
+            "sha256": "835b5319bc8b607ec3e6cc462815a6d543f3e9f97bc9364ce0993197c33dbb91"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -112,17 +112,10 @@
         },
         "django-picklefield": {
             "hashes": [
-                "sha256:9052f2dcf4882c683ce87b4356f29b4d014c0dad645b6906baf9f09571f52bc8",
-                "sha256:f1733a8db1b6046c0d7d738e785f9875aa3c198215de11993463a9339aa4ea24"
+                "sha256:67a5e156343e3b032cac2f65565f0faa81635a99c7da74b0f07a0f5db467b646",
+                "sha256:e03cb181b7161af38ad6b573af127e4fe9b7cc2c455b42c1ec43eaad525ade0a"
             ],
-            "version": "==2.0"
-        },
-        "django-spreadsheetresponsemixin": {
-            "hashes": [
-                "sha256:49bc18d53ccc9e6301804f7b73ca54b1d1c3f9ced18540531647e17e9b1c4f54"
-            ],
-            "index": "pypi",
-            "version": "==0.1.10"
+            "version": "==2.1.1"
         },
         "django-tables2": {
             "hashes": [
@@ -444,11 +437,11 @@
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:bdd9b7c397c273bcc9a11d6629a38487cd07154fa255a467bf704cd2c258e359",
-                "sha256:f17c015735e1a88296994c0697ecea7e11db24290941983b08c9feb30921e6d8"
+                "sha256:06f5b3a99029c7134207dd882428a66992a9de2bef7c2b699b5641f9886c3302",
+                "sha256:b97607a1a18a5100839aec1dc26a1ea17ee0d93b20b0f008d80a5a050afb200b"
             ],
-            "markers": "python_version < '3.8'",
-            "version": "==1.4.0"
+            "markers": "python_version >= '3.6'",
+            "version": "==1.5.0"
         },
         "isort": {
             "hashes": [
@@ -483,11 +476,11 @@
         },
         "packaging": {
             "hashes": [
-                "sha256:aec3fdbb8bc9e4bb65f0634b9f551ced63983a529d6a8931817d52fdd0816ddb",
-                "sha256:fe1d8331dfa7cc0a883b49d75fc76380b2ab2734b220fbb87d774e4fd4b851f8"
+                "sha256:170748228214b70b672c581a3dd610ee51f733018650740e98c7df862a583f73",
+                "sha256:e665345f9eef0c621aa0bf2f8d78cf6d21904eef16a93f020240b704a57f1334"
             ],
-            "markers": "python_version != '3.2.*' and python_version >= '2.6' and python_version != '3.0.*' and python_version != '3.1.*'",
-            "version": "==20.0"
+            "markers": "python_version != '3.0.*' and python_version >= '2.7' and python_version != '3.2.*' and python_version != '3.1.*'",
+            "version": "==20.1"
         },
         "pluggy": {
             "hashes": [
@@ -639,19 +632,19 @@
         },
         "werkzeug": {
             "hashes": [
-                "sha256:7280924747b5733b246fe23972186c6b348f9ae29724135a6dfc1e53cea433e7",
-                "sha256:e5f4a1f98b52b18a93da705a7458e55afb26f32bff83ff5d19189f92462d65c4"
+                "sha256:1e0dedc2acb1f46827daa2e399c1485c8fa17c0d8e70b6b875b4e7f54bf408d2",
+                "sha256:b353856d37dec59d6511359f97f6a4b2468442e454bd1c98298ddce53cac1f04"
             ],
             "index": "pypi",
-            "version": "==0.16.0"
+            "version": "==0.16.1"
         },
         "zipp": {
             "hashes": [
-                "sha256:57147f6b0403b59f33fd357f169f860e031303415aeb7d04ede4839d23905ab8",
-                "sha256:7ae5ccaca427bafa9760ac3cd8f8c244bfc259794b5b6bb9db4dda2241575d09"
+                "sha256:ccc94ed0909b58ffe34430ea5451f07bc0c76467d7081619a454bf5c98b89e28",
+                "sha256:feae2f18633c32fc71f2de629bfb3bd3c9325cd4419642b1f1da42ee488d9b98"
             ],
-            "markers": "python_version >= '3.5'",
-            "version": "==2.0.0"
+            "markers": "python_version >= '3.6'",
+            "version": "==2.1.0"
         }
     }
 }