api: remove unnecessary lines from except.txt

When I added the text/template/parse lines, I thought that both removed
and added APIs should be listed here (i.e. both -pkg and +pkg lines).
However that was wrong, as one can see by reading cmd/api/goapi.go, or
seeing how removing the +pkg lines does not break the API test.

Change-Id: I0a8dcd6db44762dadb58728acfb844bf118c9d45
Reviewed-on: https://go-review.googlesource.com/105376
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

api/except.txt

@@ -362,21 +362,11 @@ pkg syscall (openbsd-386-cgo), const SYS_KILL = 37
 pkg syscall (openbsd-amd64), const SYS_KILL = 37
 pkg syscall (openbsd-amd64-cgo), const SYS_KILL = 37
 pkg unicode, const Version = "9.0.0"
-pkg text/template/parse, method (*AssignNode) Copy() Node
-pkg text/template/parse, method (*AssignNode) String() string
 pkg text/template/parse, method (*VariableNode) Copy() Node
 pkg text/template/parse, method (*VariableNode) String() string
-pkg text/template/parse, method (AssignNode) Position() Pos
-pkg text/template/parse, method (AssignNode) Type() NodeType
 pkg text/template/parse, method (VariableNode) Position() Pos
 pkg text/template/parse, method (VariableNode) Type() NodeType
-pkg text/template/parse, type AssignNode struct
-pkg text/template/parse, type AssignNode struct, Ident []string
-pkg text/template/parse, type AssignNode struct, embedded NodeType
-pkg text/template/parse, type AssignNode struct, embedded Pos
 pkg text/template/parse, type PipeNode struct, Decl []*VariableNode
-pkg text/template/parse, type PipeNode struct, Decl bool
-pkg text/template/parse, type PipeNode struct, Vars []*AssignNode
 pkg text/template/parse, type VariableNode struct
 pkg text/template/parse, type VariableNode struct, Ident []string
 pkg text/template/parse, type VariableNode struct, embedded NodeType