Remove printers (#2408)

* Remove Brother

- Brother was prone to false positives for everything with a <title> starting with `brother`
- I doubt that the other rule was triggered by anyone.

* Remove Dell, since it had no ways of being detected

* Chai Server is used on other things that HP printers

- Remove the implication on HP for Chai Server
- Remove HP since it can't be detected anymore anyway

* Remove a now unused icon

* Remove a useless file

src/apps.json

@@ -1331,17 +1331,6 @@
       },
       "website": "https://www.braintreepayments.com"
     },
-    "Brother": {
-      "cats": [
-        40
-      ],
-      "html": [
-        "(?:<!--|<BR>)Copyright\\(C\\) [\\d-]+ Brother Industries",
-        "<TITLE>\\n\\s*BROTHER "
-      ],
-      "icon": "Brother.png",
-      "website": "http://www.brother.com"
-    },
     "BrowserCMS": {
       "cats": [
         1
@@ -2416,13 +2405,6 @@
       "script": "dedeajax",
       "website": "http://dedecms.com"
     },
-    "Dell": {
-      "cats": [
-        40
-      ],
-      "icon": "Dell.svg",
-      "website": "http://dell.com"
-    },
     "DirectAdmin": {
       "cats": [
         9
@@ -3944,13 +3926,6 @@
       "implies": "PHP\\;confidence:75",
       "website": "http://hhvm.com"
     },
-    "HP": {
-      "cats": [
-        40
-      ],
-      "icon": "HP.svg",
-      "website": "http://hp.com"
-    },
     "HP ChaiServer": {
       "cats": [
         22
@@ -3959,7 +3934,6 @@
         "Server": "HP-Chai(?:Server|SOE)(?:/([\\d.]+))?\\;version:\\1"
       },
       "icon": "HP.svg",
-      "implies": "HP",
       "website": "http://hp.com"
     },
     "HP Compact Server": {

src/icons/Dell.svg

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg height="72" version="1.1" width="72" xmlns="http://www.w3.org/2000/svg">
-  <path d="m33.479 27.059-8.942 6.879c-0.917-3.44-3.899-5.963-7.568-5.963h-6.4199v15.822h6.4199c3.6688 0 6.8785-2.5234 7.5664-5.9629l8.9434 6.8789 8.9434-6.8789v5.9629h10.088v-3.2109h-6.6484v-12.611h-3.6699v5.9609l-8.4844 6.8809-1.835-1.606 4.129-3.211 4.3555-3.4395-2.5215-2.0625-8.4844 6.6484-1.834-1.6055 8.4844-6.4199-2.5234-2.0625zm-19.49 4.125h2.752c0.57325 0 1.1325 0.13072 1.6484 0.36719 0.51592 0.23647 0.9874 0.57983 1.3887 1.0098 0.40128 0.42994 0.73164 0.94498 0.96094 1.5254s0.35742 1.2262 0.35742 1.9141c0 0.63058-0.11479 1.2467-0.32617 1.8164-0.21139 0.56967-0.51931 1.0928-0.90625 1.5371-0.38694 0.44427-0.85223 0.81007-1.3789 1.0645-0.52667 0.25438-1.1136 0.39648-1.7441 0.39648h-2.752v-9.6309zm49.987 9.4031v3.2102h-10.089v-15.822h3.6688v12.611h6.4204zm-27.976-40.587c-19.72 0-36 16.28-36 36s16.051 36 36 36 36-16.051 36-36-16.28-36-36-36zm0 3.6699c2.2356-0.000025 4.4168 0.22437 6.5234 0.6543 2.1067 0.42993 4.1395 1.064 6.0742 1.8809 1.9347 0.81688 3.7725 1.8177 5.4922 2.9785s3.3214 2.4816 4.7832 3.9434 2.7825 3.0635 3.9434 4.7832c1.1608 1.7197 2.1616 3.5575 2.9785 5.4922 0.81688 1.9347 1.4509 3.9676 1.8809 6.0742 0.42994 2.1067 0.6543 4.2878 0.6543 6.5234s-0.22436 4.4168-0.6543 6.5234c-0.42994 2.1067-1.064 4.1395-1.8809 6.0742-0.81688 1.9347-1.8177 3.7725-2.9785 5.4922s-2.4816 3.3214-3.9434 4.7832-3.0635 2.7825-4.7832 3.9434c-1.7197 1.1608-3.5575 2.1616-5.4922 2.9785-1.9347 0.81688-3.9676 1.4509-6.0742 1.8809-2.1067 0.42994-4.2878 0.6543-6.5234 0.6543s-4.4168-0.22436-6.5234-0.6543c-2.107-0.427-4.14-1.061-6.075-1.878-1.934-0.817-3.772-1.818-5.492-2.979-1.72-1.16-3.321-2.481-4.783-3.943s-2.783-3.063-3.9434-4.783c-1.1608-1.72-2.1616-3.558-2.9785-5.492-0.8169-1.935-1.4509-3.968-1.8809-6.075-0.4299-2.106-0.6543-4.287-0.6543-6.523s0.2244-4.417 0.6543-6.523c0.4299-2.107 1.064-4.14 1.8809-6.075 0.8169-1.934 1.8177-3.772 2.9785-5.492 1.1604-1.72 2.4814-3.321 3.9434-4.783s3.063-2.783 4.783-3.9434c1.72-1.1608 3.558-2.1616 5.492-2.9785 1.935-0.8169 3.968-1.4509 6.075-1.8809 2.106-0.4299 4.287-0.6543 6.523-0.6543z" fill="#007db8" />
-</svg>