Remove grafana-cloud

I've migrated back to Uptime Robot, for simplicity. Sadly their API limits make it almost impossible to properly Terraform.

terraform/.terraform.lock.hcl

@@ -68,41 +68,6 @@ provider "registry.terraform.io/go-gandi/gandi" {
   ]
 }
 
-provider "registry.terraform.io/grafana/grafana" {
-  version     = "1.39.0"
-  constraints = "1.39.0"
-  hashes = [
-    "h1:1mM6Lo7QLyOsRYp3dPAFPmBcFHqyJO/YK6l92zjQXNg=",
-    "h1:C5qvkdvImXqdUu7W8ISdv7h1GryA4SGi4ea2CxyNFew=",
-    "h1:DQQX+e1cs+cEZsL+Q5EMJ4IuHe0tWbKQ0UaqB3INuhc=",
-    "h1:EWB6w80b9MBMWRJcZhznYLBmAl0cDXXOqouduPhOz50=",
-    "h1:Nl4nVj1TUl81opVp7In4NCnwSrbj3RSSvAH3jocBwl4=",
-    "h1:X+qxgNRQHoymJtzB5iO91TP8/Qo5oG0Cyy39Y09+M4Q=",
-    "h1:XnopxRTFHnNQ7CXBKgEu8+/0pUyeyAF4Vnw2SNF2UYM=",
-    "h1:ZvOO4RcqIgR4X16vOjqoAtigKSvFZ2YCoq5T6plaCds=",
-    "h1:h3hwjn2l0PGsz5gPK+qfXggOj4HG31HUJiGsIm9FyRY=",
-    "h1:iLOhpNj4n5iVhGM8AqeQ2kfi36MbEXUFsOjiyJABYv8=",
-    "h1:kIpAobauPuPVyqH9GxENq3V+8q2xdinEDDjlsHTXMLI=",
-    "h1:p3/FqgDiBmkZcLkuIPsZdLfh3m0VRAg1mRJI+icQXlQ=",
-    "h1:vGiT7sf1y+8ytOEGTJAOpCEvhYV9+g3cpyh8w0+q0d4=",
-    "h1:z7cRviSsuqmSf5yPc4Iiv0Pb9ckxNwZlskSNwb1ynyE=",
-    "zh:44a628995f19af4aaffd1850636d53629b378bb024294315412e5dd38b44346b",
-    "zh:4728b1852e8373e5bfdecb08516eca6a23d1a839aeec70272f4aacce87371987",
-    "zh:58990894ceeebb389202b15d1d4566b1ef50b2f1ad5b8a74843f6cce1fa3d8b1",
-    "zh:60d5258498f6f3d223c3d2fbdfd80c48f7f94f848afd2d020435d3adfe40181d",
-    "zh:6511cfcac3e94307af9a934fa947ea7f35c807ad27fff4e4c69f3355d22ded38",
-    "zh:7b68d76e3e423aaedb4a76b73a2cc5f92d3647512d0291cd9cae1f0bce4b2053",
-    "zh:9819f231ff2dbac0e03a292ef3174b5b219e0611e41991afe8fe2b1592d43c24",
-    "zh:a582a002c78eece4361433f661db2c351864ef9b73ac8208fbad39897d93de95",
-    "zh:a8f6bedc2c21e8b300eeffe892105e0fd2d25fef26f58ed573404f94090b3439",
-    "zh:b65ee5850289459e8a6d21d2229756405aec897e23794c452c21e00c6ff81c6f",
-    "zh:ce5ca97ae36c39a5aa1fdf5714b8204d98d32d33009febd0758e6414a032727b",
-    "zh:da1e8b938b7f93990a3e960b4bcb4768c8f6187161646dfcbd47b636e4725d8c",
-    "zh:f22131b245519ee605b82ff13ce686b1f5301b8293532c97f4de8a5a2cdf2153",
-    "zh:fe92388019044cdae3e7112bac5896bc0c3523e1065764f0c88308edae185199",
-  ]
-}
-
 provider "registry.terraform.io/hashicorp/aws" {
   version     = "4.67.0"
   constraints = "4.67.0"