Bump Go to 1.24 (#110)

It would be great to use https://pkg.go.dev/sync/atomic#Pointer for
#109, but it requires a newer version of Go.
Also, drop `vendor/` because it does not make sense to keep it in the
library.

Author: AlekSi

.github/workflows/main.yml

@@ -8,12 +8,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
-          go-version: stable
+          go-version: oldstable
         id: go
       - name: Code checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Test
         run: |
           go test -v ./... -coverprofile=coverage.txt -covermode=atomic
@@ -31,4 +31,3 @@ jobs:
         with:
           token: ${{secrets.CODECOV_TOKEN}}
           files: ./coverage.txt
-

go.mod

@@ -1,10 +1,12 @@
 module github.com/VictoriaMetrics/metrics
 
+go 1.24.0
+
+toolchain go1.25.5
+
 require (
 	github.com/valyala/histogram v1.2.0
-	golang.org/x/sys v0.15.0
+	golang.org/x/sys v0.38.0
 )
 
 require github.com/valyala/fastrand v1.1.0 // indirect
-
-go 1.18

go.sum

@@ -2,5 +2,5 @@ github.com/valyala/fastrand v1.1.0 h1:f+5HkLW4rsgzdNoleUOB69hyT9IlD2ZQh9GyDMfb5G
 github.com/valyala/fastrand v1.1.0/go.mod h1:HWqCzkrkg6QXT8V2EXWvXCoow7vLwOFN002oeRzjapQ=
 github.com/valyala/histogram v1.2.0 h1:wyYGAZZt3CpwUiIb9AU/Zbllg1llXyrtApRS815OLoQ=
 github.com/valyala/histogram v1.2.0/go.mod h1:Hb4kBwb4UxsaNbbbh+RRz8ZR6pdodR57tzWUS3BUzXY=
-golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
-golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
+golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=